NSMutableAttributedString 设置不同颜色，不同字体的String

UILabel *infoLabel = [[UILabel alloc]initWithFrame:CGRectMake(95, 20, 190, 70)];

infoLabel.backgroundColor = [UIColor clearColor];

infoLabel.textAlignment = NSTextAlignmentLeft;

infoLabel.font = [UIFont systemFontOfSize:13];

infoLabel.numberOfLines = 0;

infoLabel.textColor = KSignTextColor;

NSString *infoString = @"连续签到1天得10积分；\n连续签到2天得15积分；\n连续签到3天及以上得20积分；\n注：若连续签到终端则重新计算";

NSRange infoRange = [infoString rangeOfString:@"注："];

NSMutableAttributedString  *infoATString = [[NSMutableAttributedString alloc]initWithString:infoString ];

[infoATString addAttribute:NSForegroundColorAttributeName

value:[UIColor redColor]

range:infoRange];

// NSRange range = NSMakeRange(infoString.length-1, 1);

//[infoATString addAttribute:(NSString *)kCTFontAttributeName value:(id)[UIFont systemFontOfSize:10] range:range];

[infoLabel setAttributedText:infoATString];